in ohio he leads governor romney by ten points, 53% to 43%. john dickerson is our cbs news political director. john, some republicans are complaining these polls aren't painting an accurate picture. do they have a case? >> reporter: well, they have a case when they remind us that polls are a snapshot in time and that things can change. really what we should look at in polls is the trends and how things are moving over time, the currents. and right now those favor barack obama. the polls are really more like a painting than they are a digital photograph. one of the other complaints is that pollsters are talking to too many democrats. in 2004 democrats said pollsters were talking to too many republicans. it's a standard complaint for the party that the currents are moving against. >> pelley: john, why is there such a difference between the national poll which is essentially a tie and the poll in the battleground states? >> well, they're really polls of two different countries. the battleground states peoples v seen millions of dollars of ads, ma